Add import hmac

app.py

@@ -11,6 +11,8 @@ from langchain.prompts import PromptTemplate
 from langchain.prompts.few_shot import FewShotPromptTemplate
 import os
 
+# Web App
+import hmac
 import streamlit as st
 from streamlit_chat import message
 from PIL import Image
@@ -175,7 +177,7 @@ if prompt := st.chat_input("What is up?"):
             if src.page_content.startswith('Paragraph:'):
                 sources.add(src.metadata['source'])
         sources = list(sources)
-        
+
         if len(sources)==0:
             full_response = full_response + "\n\n[No sources]"
         else: